Patents by Inventor David P. C. Fung

David P. C. Fung has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of binding lignocellulosic materials
    Patent number: 4265846
    Abstract: A low cost method of binding lignocellulosic materials utilizing ammonium based spent sulfite liquor alone as the binder. Hot pressing a mat comprising lignocellulosic material and ammonium spent sulfite liquor at a temperature above 170.degree. C. decomposes the spent sulfite liquor. The decomposition products subsequently condense and polymerize in the presence of lignocellulosic materials to produce a composite product. An exterior grade board can be produced under certain operating conditions. Utilizing the lower molecular weight fraction of the liquor provides a more efficient binder.
    Type: Grant
    Filed: October 5, 1979
    Date of Patent: May 5, 1981
    Assignee: Canadian Patents and Development Limited
    Inventors: Kuo-Cheng Shen, David P. C. Fung, Louis Calve